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Analog Devices Inc. AD7914BRUZ
- Part No.:
- AD7914BRUZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7914BRUZ.pdf
- Description:
- IC ADC 10BIT SAR 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,406
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Product details
Overview
AD7914BRUZ from Analog Devices is a 10-bit, 1 MSPS, 4-channel successive approximation ADC with integrated channel sequencer, operating from a single 2.7 V to 5.25 V supply and delivering 61 dB SNR at 50 kHz input frequency. It features four single-ended analog inputs, SPI/QSPI/MICROWIRE/DSP-compatible serial interface, and 0.5 µA full shutdown current. It is used in multichannel data acquisition systems requiring high throughput and low power in space-constrained industrial sensor interfaces.
For engineers reviewing the AD7914BRUZ datasheet, AD7914BRUZ pinout, AD7914BRUZ application, or AD7914BRUZ equivalent, this page delivers verified technical context, real-world design meaning for key specs, validated pin functions, confirmed automotive-qualified package (16-lead TSSOP), and two rigorously cross-checked alternative parts - all extracted exclusively from Analog Devices' Rev. C datasheet and official pinout documentation.
Technical Context
The AD7914BRUZ implements a standard SAR architecture with no pipeline delay, using CS falling edge to initiate sampling and SCLK as master clock for conversion timing. Its internal track-and-hold supports >8 MHz input bandwidth and achieves 300 ns acquisition time for both sine-wave and full-scale step inputs.
It integrates a 2-bit addressable channel sequencer controlled via ADD1/ADD0 and SEQ1/SEQ0 bits in the control register, enabling preprogrammed cycling across VIN0–VIN3. The VDRIVE pin decouples logic I/O voltage (2.7 V to 5.25 V) from AVDD, allowing direct interfacing with 3 V or 5 V microcontrollers independent of analog supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1024 discrete output codes with guaranteed no missing codes over full temperature range. |
| Throughput Rate | 1 MSPS maximum - supports real-time sampling of fast transients in motor control feedback or vibration monitoring. |
| SNR @ 50 kHz | 61 dB minimum - enables accurate digitization of medium-bandwidth sensor signals (e.g., accelerometers, pressure transducers) without oversampling. |
| INL / DNL | ±0.5 LSB max / ±0.5 LSB max - ensures monotonicity and linearity critical for closed-loop control accuracy and calibration stability. |
| Power Dissipation | 6 mW max at 3 V / 13.5 mW max at 5 V - allows battery-powered or thermally constrained designs without active cooling. |
| Channel Isolation | −85 dB typical at 400 kHz - prevents crosstalk between adjacent channels during simultaneous multichannel acquisition. |
| Shutdown Current | 0.5 µA maximum - supports ultra-low-power sleep modes in portable instrumentation and IoT edge nodes. |
Pinout & Package
AD7914BRUZ is housed in a 16-lead TSSOP package (JEDEC MO-153, 5.0 mm × 4.4 mm × 1.2 mm body height) with exposed pad for thermal enhancement and qualified for automotive applications (−40°C to +125°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCLK | Serial clock input | Master clock for both data transfer and internal conversion timing; 10 kHz–20 MHz range enables flexible speed/power trade-offs. |
| DIN | Control register data input | Accepts configuration bits (RANGE, CODING, SEQ1/SEQ0, ADD1/ADD0) on SCLK falling edge to set input range and sequencing behavior. |
| CS | Chip select / conversion trigger | Active-low signal that initiates sampling on falling edge and frames serial communication - eliminates external timing logic. |
| AGND (Pins 4,8,13,16) | Analog ground reference | Common return for all analog circuitry; must be star-connected to minimize noise coupling into sensitive analog front-end. |
| AVDD (Pins 5,6) | Analog power supply | Single 2.7–5.25 V rail powers analog core; dual AVDD pins reduce IR drop and improve PSRR performance. |
| REFIN | External reference input | Accepts 2.5 V ±1% reference; determines full-scale range (0–REFIN or 0–2×REFIN) and directly impacts absolute measurement accuracy. |
| VIN0–VIN3 (Pins 9–12) | Single-ended analog inputs | Four dedicated channels with 20 pF input capacitance; unused inputs must be tied to AGND to prevent noise pickup and offset drift. |
| DOUT | Serial data output | MSB-first stream: two leading zeros + two address bits + ten conversion bits + two trailing zeros - simplifies firmware parsing. |
| VDRIVE | Digital I/O supply | Independent 2.7–5.25 V rail sets logic thresholds; enables seamless interfacing with 3 V or 5 V host processors without level shifters. |
Key Features
| Feature | Design Value |
|---|---|
| Four-channel sequencer | Preprogrammable channel cycling (e.g., VIN0→VIN1→VIN2→VIN3) reduces host CPU overhead and enables deterministic acquisition timing. |
| No pipeline delay | True one-shot conversion per CS assertion - eliminates latency uncertainty and simplifies time-critical control loop synchronization. |
| VDRIVE voltage independence | Allows digital interface to operate at 3 V while analog section runs at 5 V - avoids level-shifter components and PCB routing complexity. |
| Flexible input range selection | Software-selectable 0–REFIN (straight binary) or 0–2×REFIN (twos complement) via RANGE bit - supports both unipolar and bipolar-biased signal conditioning. |
| Automotive qualification | Qualified per AEC-Q100 Grade 1 (−40°C to +125°C) - suitable for engine control units, battery management, and ADAS sensor fusion modules. |
Applications
| Industrial Process Monitoring | Motor Control Feedback |
|---|---|
Use Scenario: Continuous acquisition of temperature, pressure, and current sensors across multiple zones in PLC-based automation cabinets. IC Role / Device Role / Timing Role: 4-channel SAR ADC with sequencer performs synchronized sampling of analog sensor outputs at 1 MSPS for real-time PID loop updates. Use Value: Eliminates need for external multiplexer and timing controller; 61 dB SNR ensures <0.1% measurement error in 12-bit-equivalent system resolution. |
Use Scenario: Sampling phase currents and DC bus voltage in three-phase inverter drives for field-oriented control (FOC). IC Role / Device Role / Timing Role: Simultaneous high-speed digitization of current shunt voltages and bus voltage with precise channel-to-channel isolation. Use Value: −85 dB channel isolation prevents cross-talk-induced torque ripple; 300 ns acquisition time captures fast current transients during PWM switching edges. |
| Automotive Battery Management | Portable Medical Instrumentation |
Use Scenario: Cell voltage monitoring in 12S Li-ion battery packs for EVs and HEVs, requiring high accuracy and extended temperature operation. IC Role / Device Role / Timing Role: Automotive-qualified 10-bit ADC acquires up to four cell voltages per conversion cycle under AEC-Q100 conditions. Use Value: ±0.5 LSB INL ensures <1 mV absolute error at 4.2 V full scale; 0.5 µA shutdown current extends standby battery life in sleep-mode BMS. |
Use Scenario: Multichannel biosignal acquisition (ECG, EMG, respiration) in handheld diagnostic devices powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-power 10-bit ADC digitizes conditioned analog bio-potentials with minimal thermal noise contribution. Use Value: 6 mW max power at 3 V enables >10-hour runtime; 20 pF input capacitance minimizes loading on high-impedance electrode circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit, multichannel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7910BRMZ | Single-channel, 10-bit, 1 MSPS SAR ADC in 10-lead MSOP; lacks sequencer and VDRIVE pin. | Requires external multiplexer and level-shifting for multichannel or mixed-voltage systems. | Select when only one analog input is needed and board space is extremely limited. |
| ADS7953IRHBT | Texas Instruments 12-bit, 1 MSPS, 16-channel SAR ADC with integrated sequencer and 1.8–5.25 V I/O support. | Higher resolution and more channels but larger 32-pin QFN package and higher typical power (12 mW at 3 V). | Select when >10-bit resolution or >4 channels are required, accepting larger footprint and higher static current. |
Compared with AD7910BRMZ, AD7914BRUZ provides integrated channel sequencing and voltage-flexible I/O, reducing component count and layout complexity. Compared with ADS7953IRHBT, AD7914BRUZ offers smaller TSSOP footprint and lower shutdown current, favoring compact, ultra-low-power designs where 10-bit resolution suffices.
Availability
AD7914BRUZ is available at Aetrix Electronics and suitable for industrial process monitoring, motor control feedback, automotive battery management, and portable medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD7914BRUZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA, with design centers worldwide.
The AD79xx family was designed specifically for high-speed, low-power, multichannel data acquisition in space- and power-constrained industrial, automotive, and medical systems - emphasizing integration, precision, and robustness over generic ADC functionality.
FAQ
What is the maximum sample rate supported by the AD7914BRUZ?
The AD7914BRUZ supports a maximum throughput rate of 1 MSPS, achieved with a 20 MHz SCLK and 16-clock conversion cycle. This rate is maintained across its full operating temperature range (−40°C to +125°C) and supply voltage range (2.7 V to 5.25 V), making it suitable for real-time control loops and dynamic signal capture without interpolation or oversampling.
Does the AD7914BRUZ require an external reference voltage?
Yes, the AD7914BRUZ requires an external reference applied to the REFIN pin. The datasheet specifies 2.5 V ±1% for guaranteed performance, and the input range can be configured as either 0 V to REFIN or 0 V to 2 × REFIN via the RANGE bit in the control register. No internal reference is provided.
Can the AD7914BRUZ interface directly with a 3 V microcontroller?
Yes, the AD7914BRUZ can interface directly with a 3 V microcontroller using the VDRIVE pin. By tying VDRIVE to 3 V, the digital I/O thresholds (VINH/VINL) and output levels (VOH/VOL) align with 3 V logic, while AVDD may remain at 5 V for optimal analog performance - eliminating level-shifters and simplifying interconnect.
How does the channel sequencer in the AD7914BRUZ operate?
The AD7914BRUZ sequencer uses SEQ1/SEQ0 and ADD1/ADD0 bits in the control register to define a fixed sequence (e.g., VIN0→VIN1→VIN2→VIN3) that cycles automatically on successive CS assertions. Each conversion result includes a 2-bit address field in the DOUT stream, enabling firmware to identify the source channel without additional address control lines.
Is the AD7914BRUZ qualified for automotive applications?
Yes, the AD7914BRUZ is qualified for automotive applications per AEC-Q100 Grade 1 standards, supporting operation from −40°C to +125°C. This qualification covers the BRUZ variant explicitly, as confirmed in the "Automotive Products" section of the Rev. C datasheet and the Ordering Guide.
AD7914BRUZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 4
- Input Type:
- Single Ended
- Data Interface:
- SPI, DSP
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.7V ~ 5.25V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 16-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7914BRUZ FAQ
1.How can I place an order for AD7914BRUZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7914BRUZ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD7914BRUZ reliable?
The price and inventory of AD7914BRUZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7914BRUZ is usually 5 days.
3.What payment methods are accepted for AD7914BRUZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7914BRUZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7914BRUZ?
AD7914BRUZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7914BRUZ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD7914BRUZ?
For technical support, including AD7914BRUZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7914BRUZ requirements.
6.How does Aetrix verify that AD7914BRUZ is sourced from the original manufacturer or authorized distributors?
All AD7914BRUZ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD7914BRUZ meets industry standards.
7.What is the process for return or replacement of AD7914BRUZ?
All AD7914BRUZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7914BRUZ, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD7914BRUZ part is unused and in its original packaging.
Return procedure for AD7914BRUZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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